Jianbing Hu Hua Wei Lingdong Zhao Synchronization of fractional-order chaotic systems with multiple delays by a new approach. 1068-1083 2015 51 Kybernetika 6 https://doi.org/10.14736/kyb-2015-6-1068 db/journals/kybernetika/kybernetika51.html#HuWZ15